>> at this point in time our focus of the information is the area that the governor mentioned. >> we're actually working very closely with the families right now who are setting up a location near here that families can come to if they have any questions. calls of concern were going through those right now. >> sean: to twoms

>> authorities have not said if those responsible or domestic or foreign terrorists. people say they do not have a suspect in custody, but a source tells fox news authorities are guarding a person of interest at a local hospital in boston. he's reportedly 20 years old and has severe burns. the scene earlier in boston was one we have not witnessed on american soil since 911. people knocked to their feet, blood spaterd on the pavement. people running for cover and people injured. here's a lock how the tragedy, act of terror, unfolded earlier today. >> at 2:50:00 p.m. today there were simultaneous explosions that occurred along the route of the boston marathon. these explosions occurred 50 to 100 yards apart. each scene resulted in multiple

casualties.. >> the windows are all blown out. >> we do not know who did this or why. >> make no mistake, we will get to the bottom of this. we will find out who did this. we will find out why they did this. any responsible individuals, any responsible groups will feel the full weight of justice. >> pretty sad, unbelievable, and we are learning that the scene today could have been much worse as a u.s. intelligence official

told the a. p. there were two other explosive devices found near the finish line. the wall street journal said it may have been as high as five. joining us on the phone is ann, a reporter for wgbh boston and was there covering the marathon and the ground below her started to shake from the explosions. i'm sorry about what happened today. our thoughts and prayers to all the people in boston. tell us what happened at that moment. >> thanks very much, sean. it was a beautiful day, a great festive mood at the marathon. i had been covering it a couple hours and walking a block north when i heard a very, very loud noise like a cannon, and i felt the ground shake. i turned. a colleague of mine that was with me decided to go and investigate to see maybe if the grand stands had fallen down. but then as he walked away, a second boom happened and we saw a huge cloud of smoke. we didn't actually see bodies but we heard very, very loud

screams. at that point we started running away from the finish line. >> there were so many horrible descriptions of limbs and body parts all over the place. were you there up-close to see what happened? >> there was about building between myself and the finish line. i didn't see any of the chaos. but i did talk to eyewitnesses immediately after who said, who were stunned. they just said that they were seeing people flying in the air and body parts on the ground. we were all collectively running from boston over the river into cambridge. >> we are told, we timed it out to about 14 seconds from the first explosion to the second. we have a still picture from a fox -- a fox employee that was there that literally captured one of the explosions. was one louder than the other?

did you notice? >> that's a good question. no, they both felt equally loud and they were -- i immediately new something very bad had happened. >> yeah. and you could see it right there. what were the eyewitnesses that actually saw the aftermath, what did they tell you what they were seeing moments after they were coming down the block? >> well, my colleague and i spoke to one man who had been sitting at a restaurant right in front of where the bombs went off, and he said that he saw a woman's body flying through the air. he immediately ran out of the restaurant because he was scared after the first explosion and then heard the second one and just kept running. but he said he saw body parts on the ground. another person said they saw body parts on the ground and one other person said they saw people bleeding excessively. and it wasn't just runners, it was really people talking about seeing spectators. because apparently the bombs were in trash cans. >> one of the things, and we are

looking at video and this is some of the first video i saw earlier today, you could see military personnel, could see volunteers at the marathon, you see police officers, firemen, medical assistance, literally everybody jumped in and all of these people know, because of past incidents, that there's a likelihood that there will be another explosion. a horrible event happened today, another act of terrorism, which is outrageous, you also see the good side of human nature, so many people helping other people. and even the governor of massachusetts mentioned that moments ago in the press conference. >> that's a very good point. there were many acts of heroism today. there were sirens immediately and police and medics on the scene immediately. there were many people down there to help the runners to make sure people were feeling good of a that i shall run. but my instinct, of course, was to run. and many, many people did not do that. they stayed to help.

it was really incredible. >> you said it was like a canon fire. i was watching one video in particular. and it seemed like, and i'm just estimating based on a camera angle that i saw, it seemed like about 20 feet from the finish line and one elderly gentleman in particular, he was running and he was in the middle of the street. then there was a barricade, a police barricade, and then maybe 20 people deep, then the explosion happens right behind where those people were. it was so powerful that the runner in the middle of the street fell down. was it almost like a quaking underneath your feet? >> yeah. it absolutely was. it was the kind of loud but -- >> we just did a slow-mo of the guy i was talking about, about him fall down. go ahead, ann. >> it was definitely loud, and i wasn't even directly in site of the explosion. i had a building partially

blocking me. but i was on the other side and i could feel it in my press. it was that loud you feel when you are at a rock concert or something like that and you could feel the ground below you shake. >> i am glad you are safe. our thoughts and prayers are with all those people in boston and those injured, with them and their families. thanks for being with us. >> thanks. >> and there are many more questions than answers ton. joining me now to explain what is next for law enforcement officials, former l.a. pd detective mark furman is with us. mark, we don't know who or why, but when i heard there were two debt nations after we had the one, and one and then another one 14 seconds later, then the police found two other explosive devices and maybe as many as five others, as the wall street journal says. we haven't confirmed that yet. this seems to fit a pattern of a

group. where does your mind go as a detective? >> first, it's terrorism regardless if it's domestic terrorism with a middle east ideology or connection even in spirit and not physically. you know, you look at in, sean, luckily we have electronic surveillance. >> visual equipment almost this everybody's hand. that will be a huge tool in this investigation. the bombs are going to be a huge tool. but they make bombs a certain way in the middle east and they teach their bomb makers to make them in a certain way and these are certainly anti-personnel bombs. they are not intended for vehicles or buildings. these are anti-personnel. and for the terror they inflicted, not necessarily total body count of dead. >> obviously this is now a terror scene. we have to try to glean some information. but i guess there are all types

of materials that can make these bombs, mark, and the fact they were able to find others and they had to detonate them, what are some of the materials that could be used for something like this? >> sean, you know, when you really do some research into homemade bombs, you can do most of building a bomb from underneath your kitchen sink. you know, ammonia, different cleaning products, black powder. there's all kinds of ways to make explosive devices. in the middle east, anti-personnel bombs are used, are made exactly like this. they are made from everyday ingredients and they use ball bearings and pieces of shrapnel to create these kinds of injuries and had is exactly what we are looking at right now. >> if people were losing their legs in this, and we have the horrific descriptions by eyewitnesses, mark, of so many people who lost their limbs here, they obviously were put

with some type of shrapnel. there are a couple things we need to point out here. the average person that's not trying to win the marathon, the time when that man falls and that bomb goes off is 4:09. four hours and nine minutes after the marathon started. that's about the time that the greater amount of people would be likely to finish, and in a place their loved ones are there to meet them. so this was meant to inflict as much terror or fear as possible. we can conclude that, right? >> we can, but we can also conclude something else. four hours after the finishers, which is the high point, the actual peak of the event, security starts getting tired, people aren't as hypervigilant. they think the threat or the worst possibility of time for anything happening is over. things are trickling off and the day is starting to end. i think that's the opportunity

window, not necessarily the victim. >> let me play for you some of the emergency response calls that came in. there were a number of dispatch calls. among some of the things that were said was stay off the air, stay off the air, just make your way over there. why would something like that be said by the police? >> well, in my experience in los angeles, as with many metropolitan areas, anything to do with a bomb is never broadcast over the air or the police radios. you have to use a hard line, phone in and get that information. you don't use any kind of cell phones or any kind of police radio to do that. the other reason might be that they didn't want anybody to know that they believed that they have a cell phone or remote-transmitted debt nation device over the radio frequency because a terrorist would be listening to the frequency to know where law enforcement is

and isn't responding. >> every time we have a terror incident, as we watch this, and in a number of locations, i'll go back to 9/11 as an example, one tower is hit, another tower hit, a plane is hit, the pentagon. we have these two explosive devices go off right in an area there was a high concentration of people and then these other devices are found. is it over, or are we on high alert and for how long? >> well, sean, you know i will echo the voice of the terrorists. it's never over. this is a forever war that they started upon us and they are never going to end. whether it's today, tomorrow, next week or next month, they are learning. they are probing our lines with security and they are learning how to actually get close and do these kinds of terrorist acts. you know, when we look at this,

law enforcement, their biggest tool is interrogation, surveillance. whether electronic or physical. but interrogation is huge. if we take that interrogation tool out, then we only know after the fact most of these events and how they went down. >> how do we interpret the police saying, the boston police commissioner in the press conference just prior to us coming on the air, there's no suspect at the hospital but there are people we are talking to. throughout the afternoon we kept hearing the term "person of interest." in police language, how would you interpret that? >> when i was on the police department, there was no such thing as a person of interest. you are either a victim, a suspect or a witness. so a person of interest is kind of a politically correct term where we can be interested in you but not call you a suspect and we don't have to worry about any ramifications. persons of interest could be unconscious persons that meet certain criteria of that person

that was observed trying to probe a restricted area. they might have loosely fit that description so they security that person at that location until they identified them and made sure just exactly why they were there or what their connection was. once they did that they are no longer of interest to law enforcement and they become a real victim. >> mark furman, thanks so much. stay there we will get back to you. joining me live in the scene, fox news own bill hemmer is with us. bill. >> good evening from copley square. we are about two blocks away from the scene of the incident. now six hours and twenty minutes into it. listening to the press conference tonight, you really get the sense of urgency from these officials who are working this story and working this incident of this terrorist hit at 2:50 this afternoon. if you walk up and down the street you can look into different restaurants and bars. on every tv screen there's ongoing live coverage locally

here in boston and there's a number on the air, a telephone number, an 877 number for anyone who has seen anything to help people find those responsible for what happened here. also when you listen to the raw tape, the raw feed of the explosion that you see on that camera, yes, the explosion is one thing and then you hear it a few seconds later, the second explosion goes off. but after the -- the crowd erupts with absolute terror and shrieks in their voice as they run in every direction. as a human being, when you hear those sounds on what happens on an otherwise beautiful and brilliant day in boston, massachusetts, clear skies, temperatures around 50 degrees, it was a picture-perfect day for what's called patriots day today here in boston. there have been a lot of reports for the last six hours and some of it we can report on good authority, and a few other

items, some questions coming up that frankly we can't nail down tonight. but you mention reports of two other devices unexploded that were found. also there were reports from the "wall street journal" just 30 minutes ago, as you mentioned, up to five devices possibly found. we can confirm that. but all those reports are going throughout boston, reverb greating off of downtown buildings of this old, historic and patriotic town. we just saw three s.w.a.t. teams drive by a moment ago over my left shoulder. over my right shoulder the ambulances. the sirens have been here throughout the last several hours. the lights have been on top of these vehicles, police cars coming up and down. the area where the secure would be to my left on the other side of the row of build,, you can get within a block of the area and frankly i was surprised you can get that close. as reporters, we come to the scene to take a look around and offer you what we can.

and without break any laws or crossing police lines. frankly i was surprised how closely we could get. there are thousands of unclaimed yellow bags sitting on the sidewalk in boston, massachusetts tonight, sean, from runners who had prepositioned their clothing, their personal items, keys to their car, their cell phone, wallet, credit card, money. two to six thousand of those bags have not been claimed tonight and likely will not at least until tomorrow when some of those runners can gain access. >> and the difficulty for the police is every one of those bags now they must assume and use great caution when looking into them. you mentioned that you flew into logan airport, which is not far from where the finish line is for this marathon. there was an earlier report that airspace was restricted and cell phone service was shut down.

cell phones, for those who don't know, can be used to trigger explosive devices. >> all good points. i landed at 6:50 local time. flight from new york could not have been easier. as you know on that route from new york and boston, you up in the air, level off and you are landing. very brief flight, 25 or 30 minutes. it was a piece of cake. the airport was empty. it was easy to get a taxi cab to pick me up and take me literally right to the scene where we are reporting tonight. cell service has been operating since i have been here. i her the reporter earlier today police had shut it down. perhaps that is true, but i cannot confirm that from earlier today. but cell service is working. the city seems to be functioning just fine once you are outside of the immediate area here in copley square. >> bill hemmer, stay with us. we will get back to you in a few minutes. thanks for reporting. >> thank you, sean. >> he's about a block and a half away from where it all took

place today. joining me on the phone someone who witnessed a disturbing scene today. will is a candidate and he was waiting at the finish line for his boss when the bombings went off. thanks for joining us and we appreciate your time. >> thanks, sean. >> tell us everything you saw. it got so chilling in some of the coverage, there's one report in the boston herald that somebody's leg flew over my head and you hear heartbreaking stories of people taking off their belts to stop the bleeding of others. what did you see when one of the bombs went off? >> it was heart breaking. i was across copley square preparing for a press conference with my candidate, and we heard these two blasts go off about ten seconds apart. saw billowing white smoke come from the boston public library and you knew something was wrong. immediately what happened, the kind of crowd you have, it's like times square when the bulbs

are out. thousands and thousands are trying to fanned their runners and basically all those people started running east toward boston commons and the gardens. fire and police started running the of and jumping the barricades running west. people know when their loved one was crossing the finish line and they knew their person was close. a lot of fathers were jumping the barricades to get past police to get toward the finish line. it was a terrible scene. >> this really outrages me and angers me. this was designed to inflict maximum damage and harm to innocent people. you hear the stories of not only the limbs flying but now you hear some people of dead. some of the people were children. this was done right at the finish line where loved ones are waiting for those who just finished the marathon. in your case you are waiting for your senate candidate to get there. this was designed to inflict as

much damage as possible, especially the way they designed it with two bombs going off within 15 seconds of each other. >> if someone was trying to make a political point, they didn't make it. all they did was wreak havoc and hurt kids that were there to cheer on their mom or dad. it's sick and twisted and sad it had to happen in my town. >> thanks for being with us. we appreciate it. any new information, please stay in touch with us. as we reported earlier, we do not know if those responsible for today's deadly bombings in boston were domestic are to foreign. joining me is the nation's first secretary of homeland security, governor tom ridge welcome back to the program. i wish it were under better circumstances, of course. >> so do i. >> we always say it, maybe it sounds clicheed, governor, mr. secretary, but i have to tell you we have to be right 100% of the time. >> that's exactly right. >> this is how vulnerable, it reminds us how vulnerable we can

be. >> sean, you are spot on. we have to be right all the time. i think mark furman and some of the other guests have eluded to another notion that i think is very important for your audience and the rest of the country to understand. we have a tendency in a just in time world in the united states of mark to look at our watches. we have watches and they have time. every day goes buy and wave been fortunate for almost ten years with the exception of fort hood and a couple other events, but we've been very fortunate. this is a global surge and it's a reality we have to deal with. in spite of all the efforts, and i'm confident that they did everything they could to secure as best they could 26-plus miles, but at the end of the day you and i both know there are multiple events with thousands, if not hundreds of thousands of people all around this country, open spaces, stadiums, gymnasium, it's a target-rich environment for the terrorists. we've been waiting for a long

team for the next incident, and tragically it just happened today in boston. >> governor, what do you glean from the information that we do have at this hour? what do you glean from the fact there was about a 14-second interval before the second bomb went off? what do you glean from the fact that there were other devices that were, thankfully, found by the police department and they were able to detonate them? does it fit any one pattern of any group? i know it's speculation, but. >> sure. first of all, i want to compliment you, you said we have more questions than answers and i think that's important. we don't want to answer our own questions until we get more information. my view has changed just even in the past couple hours. we know it was a rudiment try, fundamental device. mark furman said you can probably make a similar device with ingredients from your own home. but at one time it was two devices and one two undetonated now there may be as many as

five. then the question becomes is there one person involved? unlikely, now it seams coordinated. how many, we don't know. and what is the detonating device? obviously there was a delay and if there were five others that were undetonated, that may be in terms of evidence and turning a finger of responsibility one of the most significant clues that the law enforcement community can come up with. >> do we know for a fact it was on a timer or a delay or could it have potentially, like what our military is dealing with in the field in iraq and afghanistan, could it be triggered by a cell phone which i think very wisely the law enforcement turned off for a while in boston. >> they were at the ready. they knew that was a potential means to detonate the other devices. that shows you how conclude into that notion and that's why they told everybody to stay off the cell phones. it's difficult. these are anti-personnel devices. they will kill a few people, but

maximum severe personal injury. as you and i are talking now there are probably dozens and hundreds of people in surgery, amputations and it's designed for that purpose. and if it's confirmed there were at least five other devices on this route or elsewhere suggests a coordinated attack. the detonating device had to be fairly sophisticated so you think more a relationship between the group responsible and probably something bigger than a domestic plot, maybe associated a broader international jihaddist organization. >> how do you interpret, mr. secretary, the police are telling us there's no suspect at the hospital but there are a few people we are talking to and all day long the terminology was there is a person of interest. my interpretation of it as a lay man, they have somebody that perhaps they saw on video with backpacks that they are suspicious of? >> i believe that that term is used, and i've heard it used a couple times and i can only tell you the context within which i heard it and how it was used,

pointing to someone they thought may have been responsible or have knowledge of the incident, if not responsible. generally it is directed toward sun they think that may be responsible or for the incident. but it's so difficult. in the pc world nobody wants to say anything. by the way i don't blame them right now. we are four hours after the incident. the police are scrambling. you have more resources down there. i don't imagine the public could ever truly appreciate the hundreds of people that are working this issue right any. not just the police within the city, but the state police, the fbi. there are probably hundreds, if not thousands of people following leads as you and i are having this conversation. again, at the outset you did the right thing. a lot of questions, not too many answers. let's fill in the gaps with facts. >> i think we will. certainly there are thing we can learn from each instance. one of the things we learned on 9/11, as you learned well, is that al-qaeda, for example, works in waves. that is they want multiple attacks at one time to create

the maximum amount of chaos. some said there seems to be similarities between the london and madrid bombings, mr. secretary. there are certain patterns you put together with certain groups and some people are more likely to claim credit than others? >> we are wait to go see if somebody claims credit. but you are right, the madrid bombings and the bombings in '05 in london, multiple attacks in public places, there one was the underground and the other was the public transportation system in madrid. so you get a sense, as we find out more and more information about more and more explosive devices, the delay between the first explosion and the second. once we know about the detonating device, it has to be for sophisticated than some of us perhaps thought initially, that it's morph a coordinated attack than any of us may have thought after the first hour of the incident. >> one more question, additional officers immediately were sent out to prominent location necessary the city of new york.

we also know in d.c. that the secret service shut down pennsylvania avenue. obviously the nation is on high alert and will stay on high alert. what period of time do you think needs to pass until things, at least in law enforcement's mind, begin to slow down and calm down? >> number one, i think it's appropriate at certain venues, we ramp up. it's been i am bed into our system for ten years. i think they will start to stand down when they get information that enables them to stand down. right now i think appropriate safety and security measures have been taken. i think it's very appropriate they have done so, and i can't give you a time frame. it may be a day, it may be a week. but tell only stand down when they have information that allows them to pull back some of the security protocols they have embedded in the past 45 hours. >> and there are a lot of sick, evil, twisted people and whoever did this designed to inflict the most damage, maximum damage and

harm to very innocent people. we need to get to the bottom of it. thank you, sir, for being with us. >> thanks, sean. >> we appreciate it. as we reported earlier, a source is telling fox news authorities are guarding a person of interest at a local 4079 in boston. we are told he's 20 years old and has severe burns on his body. we are live in washington tonight. katheryn? >> thanks. the information we have is that the nctc, this is a group created after 9/11 to monitor and assess threats against the united states, will be briefing members of congress tomorrow morning. first it will be the house intelligence committee and then we anticipate the senate intelligence committee in the afternoon. as you know late today the chair of that committee, democrat dianne feinstein has come out and called it an act of terrorism in boston. this is fluent at this point. i was told by a source familiar with the investigation that they

believe between two and five unexploded devices have been discovered in connection to what happened to boston earlier today and that's pretty consistent also with what the "wall street journal" is reporting earlier this evening. we 130 to congressman mike mccall, who has been briefed on the investigation, and he said he was getting initial reporting that shrapnel had been identified in the devices, and in this case specifically ball bearings. this is more evidence to show that the devices were designed to create a maximum number of casualties and also injuries. the fbi is on the ground in boston. they are taking that marathon route, which has now become a crime scene. they are gather the evidence like the residue from the devices to identify the explosives, the origin of the explosives, whether there is a signature of the bomb maker associated with these devices. every bomb maker makes them in a certain way. this helps them determine if all of the devices were made by the same individual or the same

group, and then again this issue of the shrapnel. a final point on the timing of the two explosions. one, and then a second almost maidly after this is a classic hallmark of a terrorist attack. let me explain why. typically what you see is the first explosion that is designed to drive everyone towards the direction of the second explosion. and if the initials information we have is correct, the second explosion was actually the more powerful device. this is all information that points to an act of terrorism, and as we were told earliery today, this is how it is viewed by the justice department and also the fbi. but it's important not to draw premature conclusions because this tactic of near simultaneous explosions, we've seen this in places like iraq and we've also seen it in northern ireland by the ira. this is a pretty standard tactic among extremist groups, sean. >> i spoke with an eyewitness

earlier today that told me the second explosion, as you point out, was louder and seemed to be stronger in their view than the first explosion. and it was about, depending on the estimates, anywhere from 30 to 100 yards apart so it was fairly close by. let me ask you one question. iffy we do have some information tonight, cbs news reported that a saudi was acting suspicious, nbc said here a young person on a student visa. we aren't trying to jump the gun, we are trying to confirm any information they have. you have seen the reports. what can you tell us about them? >> the information we can report is the boston police say they do not have a suspect in custody. but what we know through our reporting is they had a person of interest that they were questioning and based on my report this evening, i believe one of these individuals was here on a student visa but that's really as far as we can go this evening. >> thanks so much for being with you. >> you're welcome. >> let's go back to mark furman to get his reaction of what we

just heard. mark, did you glean anything out of that? >> certainly, sean. governor ridge was right on in everything that he said. we do not know exactly what the device is. i think they are sophisticated but they weren't sophisticated to all go off so something went sideways with this plan. and perhaps the person that was to detonate them remotely was one of those persons of interest oregon possibly they believe he is. that being said, the coordinated attack in this incident is a standard military tactic. you ambush in one area and then you give an avenue of escape where you actually create the real ambush. terrorists have picked this up and now they use it in the urban environment. this is what happens in israel. the soft targets, bars, restaurants, coffee shops, and they do this exact same thing. two bombs. the same type of bombs, or at least the same type of evidence where you have shrapnel, ball

bearings and pieces of metal that will inflict damage to soft tissue. >> mark, earlier you said to us, and again we are showing the video of the bombs, about some 11 second interval between the two of them, and as you can see, a lot of casualties. we are now talking about 105 people injured here tonight. there is, for example, and years ago on this very program we did a segment on an anarchist handbook where you mentioned that people can actually get whatever bomb building materials they want, oftentimes in their own home. these bombs seem to have -- they have also included the maximum amount of shrapnel to in flick as much injury and create the greatest amount of casualties among people. is it really that readily available, the materials that you are talking about, could do this? >> it is, sean. i don't think it's proper to start telling people on the air just exactly what ingredients

you need, but there are publications out there where a lot of cleaning solvents, cleaning liquids. you can go to home depot and pretty much create a bomb and the shrapnel. nails, screws, nuts, bolts, ball bearings, marbles. all these items are anti-personnel projectiles being sent into a low-level attack of people by the explosives. it doesn't have to be the type of explosives in an artillery shell or c-4 or even tnt. you just need an explosion where it creates any kind of propellant that sends the shrapnel out into a crowd. >> listening to what you are saying, mark, and i don't want to be political, there are so many families suffering tonight and they have been devastated and our thoughts and prayers are with them here, but what you are really saying here is it does add a layer of texture and

context maybe to the whole gun debate we've been playing. and i'm not trying to make it political, but you are basically saying anybody who wants to create any type of mij harm, they can use household materials to do this. am i hearing you correctly? >> you are, sean. the gun control legislation, and i don't like to be political because i think it's kind of like walking into some kind of insane issue, but, you know, they are making all this effort to pass legislation that won't stop any gun violence or any violence whatsoever. and on the very shadow of that legislation in congress we have this happen. you will never be able to stop this. you won't be able to stop people from being able to actually build these types of bombs. its unfortunate, but that's the state of affairs we live in. >> we see with a happens, how the israelis are living and the security measures to get on an

airline, getting on to an airplane when you are headed to israel, those security measures or an i.d. to get into the mall. with a number of incidents like this increasing, that will probably raise a lot of debates in this country in the future in terms of people needing identification. i guarantee there will be a lot of discussion as the days move forward. do you think that's right? >> i think it is. you know, i've been to israel, i've been to a terrorist seminar that it was actually sponsored by the government, and i will tell you this, that in an airport it is secure, but it is something that you don't see, you don't feel, you don't feel oppressed, but i will tell you in our airports, which is the most secure environment, in comparison we have no security whatsoever. in israel, in israel there's one thing that they do, they have the good of the whole and they sacrifice their personal

predooms. here our personal freedoms trump everything. >> mark furman, thanks for being with us tonight. we appreciate your insight. >> now we go to molly line standing by. what is the very latest? >> as you can see behind me this is still a very active scene. the ambulances are lined up all the way down columbus avenue, as they have been throughout the afternoon. the area around where the bombs actually went off will remain shutdown tomorrow. and the governor, deval patrick, saying boston will be open tomorrow, open for business but not business as usual. essentially there will be a heightened presence, a heightened police presence in the city of boston. if you are riding the transit system that there could be some random searches of bags. there will be a tremendous sense of a heightened vigilance and we are asking people to be aware of their surroundings and report suspicious activity. that's what we are hearing from the authorities in boston. they are asking everybody to stay inside tonight. it's okay to go to work tomorrow. if you are working in the

downtown area near where the becomes actually happened you will have to check with your employer to see if you will be able to get anywhere close to your office or not. but essentially things will be open in the city tomorrow. you will be able to come into the city, most likely go to your jobs. there will be some street closures, of course. when it comes to the investigation, the fbi has set up a tip line. 1 - 800, call fbi, prompt number three. they are saying any information, visual images, details regarding the explosion, no piece is too small. we have information that various police officers, investigators, are all across the cities at the various hospitals where victims have been taken to speak with victims and survivors and witnesses of this explosion to get more detail about what happened in the moments leading up to both of these bombs actually going off. sean. >> what do we know in terms of what surveillance was around and available? copley square is obviously an important area in boston. i've been there myself. what do we know in term of what

surveillance video may be available to law enforcement? >> well, that's a very urban area. it's an area where there are a lot of shops so it's very likely we will be seeing surveillance video come out in the following days and authorities will be gathering that. where the becomes went off, the end of the finish line, there was a tremendous amount of coverage. there were so many members of the boston media, and cameras down there. there will be a agree amount of footage coming out from that area in the days and the weeks to come. not to mention all the family men's, the moms, dads, little kids waiting for their loved ones at then of the finish line to cross the finish line. all the camera of the travelers. it's an iconic event for the city of boston on patriots day. there will be a tremendous amount of cameras and pictures for the authorities to go over in the weeks and months and possibly years to come as we are reviewing what happened here in boston. sean. >> thank you so much nor being

with us. we do have a picture, a local fox reporter was able, waiting for her husband to finish the marathon, was able to capture. you can see the fireball that was literally come out and we will put that up on the screen in just a second and show you just how big an explosion we are talking about here. joining me now former massachusetts senator scott brown. thank you for being with us. there was the picture i was discussing. there's a local fox reporter that actually took this picture, senator, and you can see the magnitude and the fireball and just how big this explosion was. i don't know if it was the first or the second explosion. we are told that the second might have been a little stronger than the first. tell us about copley square. tell us about this particular area, senator. >> sure. well, first of all, that looks like the first explosion. it's a running store. very close to the finish line, as you all know. listen, that's a very public area, it's an iconic area, the finishing of the marathon has been there forever.

i personally have been up and down there, gosh, at least a thousand times. the bottom line is this is something that, quite frankly, is cowardly. and the folks, the person or people that did this need to be held fully accountable. you know, initially, sean, i was horrified. now i'm mad. i'm mad because this type of thing on patriots day, iconic race, boston red socks and shoes, another million-five people there, and killing hundreds and we need to do a top-to-bottom review to make sure this never happens again. >> it's funny, i had the same reaction that you did. first i was horrified and then angry as people described the scene, limbs flying over their head. >> yep. >> and people using their belts and ripping everything off they could as a tourniquet to help the people. but then we get to know the knowledge of the device that was

put together here. it was designed, it was put in a place, it was designed to inflict the maximum damage with zero concern for human life. children were hurt, men and women were hurt, innocent people, law enforcement were hurt, as well. it really does make me angry, as it does you. >> it was a low-level device used to actually, you know, mame, hurt, not necessarily kill. if in fact it is true there were other devices, i understood there was one over the glass bridge going to hotels, one potentially underneath the bandstand, typically, as was said, when there's an explosion like this, people rush in to help and, bang, there another one. was that going to be the one under the bandstand, if in fact that is true? the bottom line there will be a tremendous amount of footage from the people that were there, but also in the stores. it's a very highly videoed area. i'm sure they will get some -- i hope and pray they will get

great tips from there. >> senator, why don't you tell us because you know the area, you said you have been up and down copley square a thousand times, what surveillance potential is there some because that will be very helpful for law enforcement. i know there are a lot of cameras, i know there was a lot of coverage and we could see the finish line, we see the explosion, we have that video, but we probably are going to want to see before the video. who went in, when, where and what times. does that potential exist? >> well, i can tell you certainly commissioner ed davis, i had an opportunity to view police headquarters. they have some very sophisticated devices not only there, but also because they had the dnc there, boston is a very public place because of what happened on 9/11, we've gotten some very serious homeland security dollars, i wouldn't be surprised if they already have a lot of that and they are going through it right now. but i would think it's going to take, because it will be so voluminous, it will take three or four or five days and maybe

longer to piece it all together. the first thing they do is obviously secure the area, get all the evidence, make sure the families are accounted for, and that everybody gets their personal belongings back. make sure that we, as i said, do that top-to-bottom review. and then find the people and hold them accountable. because they are cowards. >> they are cowards. as this was unfolding this afternoon, senator, one of the things i was most concerned about, because there was one and 14 seconds later there was another explosion and then we found out there were other explosive devices, it seems to fit the pattern of some terrorists. using your knowledge and background in the senate, i'm not asking you to jump to conclusions, does it fit, at least in your mind, maybe the pattern of madrid, london, 9/11, anything come to mind? anything jump out at you in terms of internal suspicions you may have? >> as one of the ranking members in homeland security, certainly these are the types of things that you see not only in

afghanistan, iraq, obviously london and other parts of the world, they are meant to inflict exactly what you are seeing on the television right now. meant to disrupt and make sure that business does not go on as usual. here's the key. is this something that is a domestic terrorist, or is it somebody that is al-qaeda, the aqap, looking to get some type of retribution as a result of the drone strikes? no one knows. but we have to fight back. guilty back by standing tall, standing aces americans first and uniting, as we do when we have tragedies like this, go to work and do everything we have to do and then hold them accountable. >> i'm looking at the scene and that was their intention. that's always the goal of these gut less, cowardly terrorists. but i have to tell you something, even with the two waves that occurred here, you still have military, police, fire, medics, just civilians. they knew there was a potential of another explosion, and you saw the best in humanity, racing

to help those people and in some cases saving their lives. senator, thank you for your time tonight. i always wish under better circumstances. our thoughts and prayers are with the people of boston tonight. thank you. >> thank you very much. >> all right. we will take a very short break. we are going to come back. we will continue following all the breaking developments out of boston as at least three people are now dead tonight. more than 130 people injured after today's terrorist attack. please stay with us. all stations come over to mission a for a final go. this is for real this time. step seven point two one two. rify and lock. command is locked. five seconds. three, two, one.

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a source tells fox news authorities are guarding a person of interest at the hospital. joining me now to help explain the challenges of law enforcement is former secret service agent for barack obama, dan is with us. welcome back. one of the things i was thinking of today, and i know this is your area of expertise and having worked at the secret service and having protected barack obama, do you think as a matter of course being the boston marathon that they had bomb sniffing dogs prayer to the marathon? >> right, but we are assuming the bombs were placed there today when the security cordon was set up. but what if you got in before it was set up and pro placed an explosive. pennsylvania avenue doesn't have any devices but when he walked down we had the entire cordon set up. so don't assume they were put there today. >> what would be the process, then, as it relates to law enforcement when they have a big

crowd like this? i assume you have to have bomb sniffing dogs going in and out at some point, right? >> right. but what we would do in the secret service and i don't know how practical for an event like the marathon, you have to clean the area out first. sweep it with the dogs, the explosives personnel from the military would look for becomes and everybody who came back in would then be swept through a magnitometer. there's no way to do that on 26 miles. >> almost impossible. i'll ask you the question i was asking a law enforcement earlier, we don't have a suspect, people we are talking to, and earlier in the day it was a person of interest. how do you interpret that? >> person of interest is kind of the in vogue term. i would say the burns on his body would seem to indicate there was some level of involvement being above and

beyond a witness. and i think special weapons teams in front of the hospital would indicate to me from a law enforcement perspective that allocating those kind of assets to protect, you know, a witness doesn't sound -- doesn't sound like that would be the case and sounds like someone who may have some intimate knowledge of what happened and may not be just a -- it may not be anything other than -- he may be part of the conspiracy. that's where i would go with it. >> stay with us. we will get back to you. joining us from the fox medical team, the former prosecutor, kimberly guilfoyle and former new york state homeland security, michael balbony is with us. when i hear -- first i was shocked, doctor, then i'm hearing these acts of heroism, people's limbs are flying over other people's head, the extent of injuries, this is to create maximum damage.

these people in the hospital, will they make it. >> people at the scene who are not trained in a war zone, because these are the kind of injuries you see in iraq and afghanistan, hats off to those who stabilized them. they had to apply turn -- tourniquets. in the hospital you have the hospital people taking over, who are trained, and they have to decide to do an amputation, a leg can be saved, take them to the o. r., whether there will be an inflection creeping in. so far it looks pretty good. 15 in critical condition, 10 am buttations so far. the trick is, and these are among the top hospitals in the country, these are the best hospitals in the country, i think there's been heroism all the way along the line here. >> i agree. even the medical staff that was there to help the runners afterwards. we expect a medical press conference coming up right at the top of the hour.

kimberly, from the standpoint, you are a former prosecutor, as we've been discussing all night, the wheel issue they have somebody -- they have somebody of interest and it evolves into somebody we are speaking to, you have some strong thoughts on that? >> yeah, i do. as soon as i heard that i wasn't surprise that law enforcement came out and tried to walk back the statement of calling it a suspect or even a person of interest because you don't want to do that because it might invoke some rules of miranda, was the person in custody, was a custodial interrogation. if a prosecution comes forward can they get somebody who was tried in the case. an phone can come back and throw this statement or this confession or this statement out because the rights were violated of this individual. i think that's really important. i think it's significant that they at least were saying person of interest, someone they were questioning. the burns i think is also indicative somebody was very close to the blast point. that's important. >> one second. we will get back to the panel in a second. there's a press conference at massachusetts general hospital of which we were just speaking

and we will take that. >> right now the hospital is operating in a business as usual mode with the exception just of some heightened security, of which i am sure you are aware. >> questions for the doctor? >> the nature you are of the injuries? >> these are blast-type injuries. these are very high force, high impact type injuries. they cause a lot of damage to tissue and to bones. we see injuries where people have extensive muscle injury, broken bones. often what we call open fractures, fractures where the bone is broken and the tissue has been opened above that. so a lot of lower extremity and sort of high-impact blast injuries. then down over the spectrum to some people had relatively minor injuries and people like having their ear drums affected by the amount of the blast. >> the numbers are going up. does that mean more people are coming or --.

>> all right. obviously we are having a little bit of difficulty. hold on a minute. here we go. obviously we good not. these are doctors at brigham and women's. >> that was in fact mass general giving a press conference. i wanted to ask you, if i can, and we only have a minute, new york security, i'm sorry, homeland security czar, how they react today and where they go forward. >> it's about the investigation. securing it, getting the evidence together and sort of begin to piece it together with all the other leads they will get. they will be needed with leads now and you can't let anything go. you have to run down everything. >> what did you take out of that press conference? >> they were also talking about the concussions. a lot of people got hurt by being there where the bombs exploded. the bombs themselves had a primary injury to legs but then you had the shrapnel flying around that you talked about before. once it gets